Quote:
Originally Posted by Freyguy
Hi Mora,
At 700mA I have to think something was miswired (different pinout for LCD).
An LED backlight draws 60~100mA and LCD controller logic is typically less than 7mA. I'm thinking Vcc and Gnd swapped on J3 or maybe this required a much larger LED ballast resistor for R19? With all control pins being digital inputs, I'm thinking the PIC should be OK.
Just curious, do you have a datasheet for this LCD?
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Yes, it is way too much. At least I was able to read contents of PIC after noticing current being too high so I suppose PIC is (somewhat) ok. I didn't solder any wires between board and lcd yet but used those spikes fitted in a plastic bar (or whatever it is called, heheh) for testing. Like the original design. I can't fit big LCD in my car easily. This display also doesn't mount correctly over the PCB.
Datasheet for the display is here:
http://www.newhavendisplay.com/specs...XZ-FSW-GBW.pdf
I remember checking it was pin compatible. I might have failed though. Datasheet tells that backlight should draw 20mA. Hmm.